“On Monday I’ll be tired and things will be a bit sore, but it will be worth it.”

After he and Robson saw off Christopher Kas and ­Sabine Lisicki in a thrilling semi-final, the ­British No.1 said he would become the Sundance Kid before the showdown with Federer, because he reckons if the roof is open today he will get his revenge against the Swiss.

Many attributed Federer’s success in the Wimbledon final to the roof closing – so Murray will be doing an anti-rain dance.

He said: “I just hope it’s dry. I would just rather play in the fresh air. Grass court ­tennis is meant to be played outdoors.

“I’ve always preferred playing outdoors to playing on grass.”

Federer, however, is a great indoors player – the last match he lost in such ­conditions was way back in 2010.

Murray added: “Playing indoors on the grass just feels a bit different.

“When the roof closes the conditions are just perfect so it’s such a ­different match.

“Things change tactically. I think I didn’t do much wrong in that final.

“It was just a couple of certain patterns of play that maybe I could have done a little bit more.”

Andy has been inspired by his fellow Scot ­Katherine Grainger’s ­magnificent effort to turn silver into gold. After claiming three silvers in the last three Games, Grainger – with Anna Watkins – finally made it to the top of the ­podium in the ­double skulls on Friday.

”I always try to keep going but obviously ­seeing stuff like the Grainger win is a ­motivation. We watched it right before I went out to ­practice today and I think they were pretty much expected to get gold and did great.

“They won by a pretty fair distance.

“We saw some of the stories and stuff on her beforehand, and to keep coming back is something that not many have done.

“I think she will tell you that she’s a lot happier than ­someone who won their gold on the first attempt.

“But he’s not played for the gold medal in singles before, so things will be even,” said Murray. “We are both in the same position.”

Focused: Federer is desperate to get the first Swiss gold of London 2012 (Image: Clive Brunskill)

But Roger Federer has warned Andy Murray that he will be feeling just as much at “home” today as the Scot.

Murray has been boosted by fantastic support from Centre Court during the tournament and there will be ecstatic ­backing for the British number one as he goes for gold.

But his great rival said: “I also feel very much at home here at Wimbledon. That has been the case for a very long time.

“Andy got amazing support when we played each other in the Wimbledon final a few weeks ago but I was able to handle that. I’ve been around as well.

“I don’t know how much the crowd affects the outcome of the match – because Andy is such a great player anyway.

“One thing giving me even more motivation is that if I win it would be the first gold medal for Switzerland in this Olympics. This is a big thing.

“What’s helped me over the years is being in this situation time and time again, you know, playing for something really, ­really big, playing for records, history books, big wins, titles, all that stuff.”